mpeg2:mpeg2_elementary_stream_structure
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| mpeg2:mpeg2_elementary_stream_structure [2022/05/10 19:27] – emcodem | mpeg2:mpeg2_elementary_stream_structure [2022/05/10 20:01] (current) – emcodem | ||
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| - | <h1>MPEG-2 Elementary Video</h1> | + | <!-- this is the global style for html elements on this page --> |
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| + | /* Tabelle mit Standardwerten */ | ||
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| - | </ | + | ===== MPEG-2 Elementary Video ===== |
| - stream structure | - stream structure | ||
| - Sequence headers | - Sequence headers | ||
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| The structure differs from that of MPEG-1 elementary video in terms of the possible extensions and, in the case of the TMPG encoder, the number of slices. | The structure differs from that of MPEG-1 elementary video in terms of the possible extensions and, in the case of the TMPG encoder, the number of slices. | ||
| - | |||
| - | ==== MPEG-2 Elementary Video ==== | ||
| - | ====== stream | + | ==== Structure of an MPEG-2 program |
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| - | Structure of an MPEG-2 program stream. | ||
| - | + | | |
| - | ==== video streaming: ==== | + | |
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| - | ====== Sequence headers | + | ===== Sequence headers ===== |
| Each header starts with the PACK_START_CODE_PREFIX, | Each header starts with the PACK_START_CODE_PREFIX, | ||
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| It should also happen that sequence headers are not marked with $000001B3 but with $000000B3. | It should also happen that sequence headers are not marked with $000001B3 but with $000000B3. | ||
| - | ===== Construction | + | == Construction == |
| - 4 bytes: SEQUENCE_HEADER_CODE = $000001B3 | - 4 bytes: SEQUENCE_HEADER_CODE = $000001B3 | ||
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| - | ====== extensions | + | ===== extensions ===== |
| At least one extension follows the sequence header. An MPEG-2 is identified via this. The ID of the extension is $B5. This is followed by the ID of the extension. These extensions should be considered for the sequence header: | At least one extension follows the sequence header. An MPEG-2 is identified via this. The ID of the extension is $B5. This is followed by the ID of the extension. These extensions should be considered for the sequence header: | ||
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| - Sequence Scalable Extension | - Sequence Scalable Extension | ||
| - | ====== Sequence Extension | + | ===== Sequence Extension ===== |
| Extensions have the ID $B5. This is followed by the ID of the extension, here $1. | Extensions have the ID $B5. This is followed by the ID of the extension, here $1. | ||
| - | ===== Construction | + | == Construction == |
| - 4 bytes: EXTENSION_START_CODE = $000001B5 | - 4 bytes: EXTENSION_START_CODE = $000001B5 | ||
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| - | ====== Sequence Display Extension | + | ===== Sequence Display Extension ===== |
| Extensionen are ID $B5. The ID is $2. | Extensionen are ID $B5. The ID is $2. | ||
| - | ===== Aufbau ===== | + | == Construction |
| 4 Byte: EXTENSION_START_CODE = $000001B5 | 4 Byte: EXTENSION_START_CODE = $000001B5 | ||
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| - | ====== Quant Matrix Extension | + | ===== Quant Matrix Extension ===== |
| Extensions have the ID $B5. The ID of this extension is $3. | Extensions have the ID $B5. The ID of this extension is $3. | ||
| - | ===== Construction | + | == Construction == |
| 4 bytes: EXTENSION_START_CODE = $000001B5 | 4 bytes: EXTENSION_START_CODE = $000001B5 | ||
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| - | ====== Copyright extension | + | ===== Copyright extension ===== |
| Extensions have the ID $B5. This extension has the ID $4. | Extensions have the ID $B5. This extension has the ID $4. | ||
| - | ===== Construction | + | == Construction == |
| * 4 bytes: EXTENSION_START_CODE = $000001B5 | * 4 bytes: EXTENSION_START_CODE = $000001B5 | ||
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| </ | </ | ||
| - | ====== Sequence Scalable Extension | + | ===== Sequence Scalable Extension ===== |
| Extensions generally have ID $B5. This extensions has got ID $5. | Extensions generally have ID $B5. This extensions has got ID $5. | ||
| - | ===== Construction | + | == Construction == |
| * 4 Byte: EXTENSION_START_CODE = $000001B5 | * 4 Byte: EXTENSION_START_CODE = $000001B5 | ||
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| - | ====== Group of Pictures | + | ===== Group of Pictures ===== |
| The ID $B8 follows the PACK_START_CODE_PREFIX for the GROUP_START_CODE. The length of the header is 4 bytes. | The ID $B8 follows the PACK_START_CODE_PREFIX for the GROUP_START_CODE. The length of the header is 4 bytes. | ||
| - | ===== Construction | + | == Construction == |
| * 4 bytes: GROUP_START_CODE = $000001B8 | * 4 bytes: GROUP_START_CODE = $000001B8 | ||
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| * 1 bit: broken link | * 1 bit: broken link | ||
| - | ==== As a scheme | + | As a scheme: |
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| - | ====== Picture Display Extension | + | ===== Picture Display Extension ===== |
| The extension start code with the ID $B5 is followed by four bits with the extension ID $B7. | The extension start code with the ID $B5 is followed by four bits with the extension ID $B7. | ||
| - | ===== Construction | + | == Construction == |
| * 4 bytes: EXTENSION_START_CODE = $000001B5 | * 4 bytes: EXTENSION_START_CODE = $000001B5 | ||
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| * 1 bit: markers | * 1 bit: markers | ||
| - | ==== As a scheme | + | As a scheme: |
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| - | ====== Picture Coding Extension | + | ===== Picture Coding Extension ===== |
| The extension start code with the ID $B5 is followed by four bits with the extension ID $B8. | The extension start code with the ID $B5 is followed by four bits with the extension ID $B8. | ||
| - | ===== Construction | + | == Construction == |
| 4 bytes: EXTENSION_START_CODE = $000001B5 | 4 bytes: EXTENSION_START_CODE = $000001B5 | ||
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| * 8 bits: sub-carrier phase | * 8 bits: sub-carrier phase | ||
| - | ==== As a scheme | + | As a scheme: |
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| - | ====== Picture Coding Extension | + | ===== Picture Coding Extension ===== |
| The extension start code with the ID $B5 is followed by four bits with the extension ID $B8. | The extension start code with the ID $B5 is followed by four bits with the extension ID $B8. | ||
| - | ===== Construction | + | == Construction == |
| 4 bytes: EXTENSION_START_CODE = $000001B5 | 4 bytes: EXTENSION_START_CODE = $000001B5 | ||
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| - | ====== Macroblock | + | ===== Macroblock ===== |
mpeg2/mpeg2_elementary_stream_structure.1652210823.txt.gz · Last modified: 2022/05/10 19:27 by emcodem